Dual Friction Plate Brakes
Contents
1. eee e e oe o rere nre n nennen nn nn neenon nn eene n n n rn e nnno n n rr Installation T Air Connections LLL LLL ILL c erre neue eem unen ue enun eene e etna eic Parts Replacement 1 Replacement P arts 1 1 nennen nennen ne en nene nnne Parts List Warranties d J iii MEX 55 53 63 23 31 MTY 81 83 54 10 18 SAL DIST AUTORIZADO 442 1 95 72 60 ventas industrialmagza com INTRODUCTION Read this manual carefully making full use of its explanations and instructions The Know How of safe continuous trouble free operation depends on the degree of your understanding of the system and your willingness to keep all components in proper operating condition Pay particular attention to all NO TES CAUTIONS and WARNINGS to avoid the risk of personal injury or property damage It is important to understand that these NOTES CAUTIONS and WARNINGS are not exhaustive Nexen cannot possibly know or evaluate all conceivable methods in which service may be2. REPLACEMENT PARTS The item or balloon number for all Nexen products is used for part identification on all product parts lists product price lists unit assembly drawings bills of materials and instruction manuals PARTS LIST TORQUE ARM Arm Torque Bar Extension Bracket Screw Cap Screw Cap Screw Cap Lockwasher Nut Lock Nut Lock F3 PP PP 1 Qty 4 DPB 15T FIGURE 7 16 Install Retaining Ring Item 27 See Fig 7 17 Reverse Steps 1 through 7 to reassemble DPB Brake noting chalk alignment marks and tighten all screws to recommended torque S ee Table 2 W hen ordering replacement parts specify model designation item number part description and quantity Purchase replacement parts through your local Nexen Distributor 4l 5779 FIGURE 8 FORM 1 20094 0601 CES gt MEX 55 53 63 2331 MTY 81 83 54 10 18 SALA DIST AUTORIZADO 442 1 95 72 60 ventas industrialmagza com DPB BRAKE Q D ZZ Bushin gt fii D 5 ire IAS SS I c 7 ZI y4 Support E Bushing FIGURE 9 Piston Drive Disc Cylinder Drive Disc Facing Friction 7 Ii HUHH I gt PA Nut Lock Screw Cap Bearing Disc Flange Mount Housing Disc Friction Ring Retaining Ring Retaining Hub Splined O ring Large O ring S
3. surfaces of the Flange Mount Disc and Friction Disc Torque is transmitted through the C ylinder Drive Disc and Piston Drive Disc to the Splined Hub attached to the Torque Arm WARNING Heat generated at the friction surfaces is dissipated by windage created by fins on the Flange Mount Disc and Friction Disc W hen air is exhausted from the cylinder return springs pull the piston to a disengaged position y WARNING Never exceed maximum recommended operating speeds See Table 3 FORM NO L 20094 C 0601 The outer assembly of the DPB Brake rotates A guard that will not restrict the flow of cooling air around the brake must be installed if the DPB Brake is installed in an area where injury to an operator could occur MEX 55 53 63 23 31 MTY 81 83 54 10 18 DIST AUTORIZADO 442 1 95 7260 ventas industrialmagza com PARTS REPLACEMENT CAUTION The Nexen DPB Brake has been bal anced at the factory During disassembly mark components with chalk align ment marks to insure correct alignment and balance as the DPB Brake is reassembled See Fig 4 Alignment Mark When reassembling the Nexen DPB Brake make sure all screws are tight ened to the recommended torque See Table 2 Alignment Mark FRICTION FACING Item 4 Alignment Mark Inspect Friction Facings for wear
4. lockwashers into Q D bushing and tapped holes of flanged hub NOTE Do not use lubricants or thread locking compounds on pull up bolts 4 Insert customer supplied key into motor shaft 5 Slide DPB Brake onto motor shaft 6 Alternately and evenly tighten pull up bolts to recom mended torque See Table 1 TORQUE ARM 1 Using Cap Screws item 42 and Lockwashers item 43 secure Torque Arm Item 37 onto Splined Hub Item 35 See Fig 3 2 Tighten Cap Screws Item 42 to 119 ft Ibs torque 3 Using Cap Screws item 40 and Lock Nut item 44 secure Extension Arm item 37 to Torque Arm Item 38 See Fig 3 4 Tighten Lock Nut item 44 to 70 ft Ibs torque 5 Using Cap Screw Item 41 and Lock Nut item 45 attach Extension Arm Item 38 to Bracket Item 39 See Fig 3 6 Tighten Lock Nut Item 45 to 200 ft Ibs torque 7 Using four customer supplied 7 16 UNC bolts CAUTION Flange mounting of the DPB Brake is not recommended Tapped holes in the DPB Brake s Splined Hub Item 35 are used to connect the brake to a torque pin or torque arm Throughly inspect tapered bore of Flanged Hub Item 36 and tapered surface of Q D bushing Remove any dirt grease or foreign material NOTE Do not use lubricants when installing bushing Install Q D bushing into flanged hub aligning untapped holes in Q D bushing flange with tapped holes in flanged hub CAUTION Do not strike Q D bushing to s
5. mall Ring Retaining Screw Machine Screw Cap Screw Shoulder RIP S pring Fitting Adapter FORM NO L 20094 C 0601 N Hub Flanged MEX 55 53 63 23 31 MTY 81 83 54 10 18 227 DIST AUTORIZADO 442 1 95 7260 ventasQindustrialmagza com WARRANTIES Warranties Nexen warrants that the Products will be free from any defects in material or workmanship for a period of 12 months from the date of shipment NEXEN MAKES NO OTHER WARRANTY EXPRESS OR IMPLIED AND ALL IMPLIED WARRANTIES INCLUDING W ITHOUT LIMITATIO N IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED This warranty applies only if a the Product has been installed used and maintained in accordance with any applicable Nexen installation or maintenance manual for the P roduct b the alleged defect is not attributable to normal wear and tear c the Product has not been altered misused or used for purposes other than those for which it was intended and d Buyer has given written notice of the alleged defect to Nexen and delivered the allegedly defective Product to Nexen within one year of the date of shipment Exclusive Remedy The exclusive remedy of the Buyer for any breach of the warranties set out above will be at the sole discretion of Nexen a repair or replacement with new serviceably used or reconditioned P roduct or issuance of cred
6. performed or the possible hazardous consequences of each method Accordingly anyone who uses a procedure that is not recommended by Nexen must first satisfy themselves that neither their safety or the safety of the product will be jeopardized by the service method selected Nexen s DPB Dual Friction Plate Brakes are designed to mount on shaft ends or through shafts using a customer supplied Q D Quick Detachable Bushing The dual friction plate design eliminates thrust loading of bearings INSTALLATION NOTE All DPB Brake installations require a O Quick Detachable Bushing Refer to Table 1 for O D Bushing S pecifications SUPPORT BUSHING NOTE The Support Bushing provides radial load support at the shaft and is used when bore sizes smaller than standard are required 1 Place DPB Brake friction disc side up and fully support Flange Mount Disc Item 5 See Fig 1 2 Insert Support Bushing into bore of Flanged Hub Item 36 See Fig 1 3 Apply even pressure around entire diameter of S upport Bushing and press Support Bushing into Flanged Hub Item 36 CAUTION Do not use a hammer to install Support Bushing A small arbor press recom mended TABLE 1 Q D Bushing Specifications ERES TORQUE Support Bushing FIGURE 1 FORM NO L 20094 C 0601 DIST AUTORIZADO INDUSTRIAL BRAKE 3 Loosely insert pull up bolts and
7. use of a thread locking compound 10 Reverse Steps 1 through 8 to reassemble the DPB Brake noting chalk alignment marks and tighten all screws to recommended torque See Table 2 FORM NO L 20094 C 0601 CES MNaacza MEX 55 53 63 23 31 MTY 81 83 54 10 18 SALA DIST AUTORIZADO 442 1 95 72 60 ventasQindustrialmagza com O RINGS Items 8 amp 9 Replace O rings Items 8 amp 9 if there are noticeable air leaks or loss of torque 1 Proceed with Steps 1 through 8 for Friction Facing replacement Remove O rings Items 8 amp 9 and clean o ring contact surfaces See Fig 6 Lubricate new O rings Items 8 amp 9 and o ring contact surfaces with O ring lubricant Install new O rings Reverse Step 1 to reassemble DPB Brake noting chalk alignment marks and tighten all screws to recommended torque See Table 2 BEARINGS Item 25 DPB Brake Bearings Item 25 are prelubricated sealed and do not require further lubrication 1 3 Disconnect air supply lines from Adaptor Fittings Item 16 Remove Cap Screws Item 42 Lockwashers Item 43 and swing Torque Arm Item 37 clear of DPB Brake Loosen Q D Bushing a Remove Q D Bushing pull up bolts and lockwashers b Insert pull up bolts into tapped Q D bushing removal holes and progressively tighten each one until Flanged Hub Item 36 is loose on Q D bushing FIGURE 6 W edge a screwdriver into saw c
8. Gu MNaaza MEX 55 53 63 2331 MTY 81 83 54 10 18 REY DIST AUTORIZADO 442 1 95 72 60 ventas industrialmagza com x AIR CHAMP PRODUCTS User Manual nexen gt 22 Dual Friction Plate Brakes Models DPB 9T DPB 11T DPB 13T and DPB 15T FORM NO L 20094 C 0601 ESS NAGZA MEX 55 53 63 2331 MTY 81 83 54 10 18 lt DIST AUTORIZADO 442 1 95 72 60 ventas industrialmagza com In accordance with Nexen s established policy of constant product improvement the specifications contained in this manual are subject to change without notice Technical data listed in this manual are based on the latest information available at the time of printing and are also subject to change without notice Technical S upport 800 843 7445 651 484 5900 www nexengroup com WARNING Read this manual carefully before installation and operation Follow Nexen s instructions and integrate this unit into your system with care This unit should be installed operated and maintained by qualified personnel O N LY Improper installation can damage your system or cause injury or death Comply with all applicable codes Nexen G roup Inc 560 O ak Grove Parkway Vadnais Heights Minnesota 55127 Copyright 2000 Nexen G roup Inc ISO 9001 Certified ii CES MNaacza MEX 55 53 63 23 31 MTY 81 83 54 10 18 SALE DIST AUTORIZADO 442 1 95 72 60 ventas industrialmagza com TABLE OF CONTENTS Introduction
9. and replace when they are approximately 9 32 thick Friction Facings can be replaced without removing DPB Brake from motor shaft Alignment 1 Disconnect air supply lines from Adaptor Fittings FIGURE 4 Mark Item 16 2 Remove Cap Screws Item 42 Lockwashers Item 43 and swing Torque Arm Item 37 clear of DPB Brake 3 Remove Cap Screws Item 12 and Locknuts Item 20 See Fig 5 4 Remove Friction Disc Item 7 See Fig 5 5 Remove Shoulder Screws Item 13 and Springs Item 14 See Fig 5 6 Slide Piston Drive Disc Item 2 off S plined Hub Item 35 See Fig 5 7 Remove Retaining Ring Item 10 See Fig 5 WARNING Special attention should be exercised when working with retaining rings Always wear safety goggles when working with spring or tension loaded fasteners or devices 8 Slide C ylinder Drive Disc item 3 off Splined Hub Item 35 See Fig 5 9 Remove Machine Screws Item 11 and replace worn Friction Facings item 4 See Fig 5 FIGURE 5 NOTE On some models of the DPB Brake the Machine Screws Item 11 are assembled with a green anerobic thread locking com pound If removal is difficult strike end of screwdriver with a hammer to break crystal ine structure of locking compound before attempting to remove screws Machine Screws Item 11 furnished with new Friction Facings have a locking patch and do not require the
10. ent shall Nexen be liable for any consequential indirect incidental or special damages of any nature whatso ever including without limitation lost profits arising from the sale or use of the Products Warranty Claim Procedures To make a claim under this warranty the claimant must give written notice of the alleged defect to whom the Product was purchased from and deliver the Productto same within one year of the date on which the alleged defect first became apparent Nexen Group Inc 800 843 7445 560 Oak Grove Parkway Fax 651 286 1099 Vadnais Heights MN 55127 www nexengroup com ISO 9001 Certified 9 FORM NO L 20094 C 0601
11. et itin the tapered bore secure Bracket Item 39 to a firm support FORM NO L 20094 C 0601 55 53 63 28 31 MTY 81 83 54 10 18 442 195 7260 ventas industrialmagza com Q D Bushing Dial Indicator inc E NN 7 FIGURE 2 CAUTION Do not over tighten pull up bolts If excessive tightening torque is applied bursting pressure is created in flanged hub NOTE Runout is minimized if a dial indicator is used as the Q D bushing pull up bolts are tightened Place contact tip of dial indicator on smooth surface of Flange Mount Disc Item 5 to measure runout Runout on this surface must not exceed 0 003 T I R when pull up bolts are tightened See Fig 2 FIGURE 3 MEX 55 53 63 23 31 MTY 81 83 54 10 18 DIST AUTORIZADO 442 1 95 7260 ventasQindustrialmagza com AIR CONNECTIONS Pneumatically actuated devices require clean pressure regulated air for maximum performance and long life Your Nexen Distributor carries filters and regulators specifically designed to operate with Nexen DPB Brakes Connect air supply to Adaptor Fittings Item 16 located on the Piston Drive Disc Item 2 NOTE AdaptorFittings Item 16 are 1 8 NPT LUBRICATION The most effective and economical way to lubricate the DPB Brake is with an air line lubricator Available from Nexen the l
12. it in the amount of the purchase price paid to Nexen by the Buyer for the Products Limitation of Nexen s Liability TO THE EXTENT PERMITTED BY LAW NEXEN SHALL HAVE NO LIABILITY TO BUYER OR ANY OTHER PERSON FOR INCIDENTAL DAMAGES SPECIAL DAMAGES CONSEQUENTIAL DAMAGES OR OTHER DAMAGES OF ANY KIND OR NATURE WHATSOEVER WHETHER ARISING OUT OF BREACH OF WARRANTY OR OTHER BREACH OF CONTRACT NEGLIGENCE OR OTHER TORT OR OTHERWISE EVEN IF NEXEN SHALL HAVE BEEN ADVISED OF THE POSSIBILITY OR LIKELIHOOD OF SUCH POTENTIALLOSS OR DAMAGE Forall of the purposes hereof the term consequential damages shall include lost profits penalties delay images liquidated damages or other damages and liabilities which Buyer shall be obligated to pay or which Buyer may incur based upon related to or arising out of its contracts with its customers or other third parties In no event shall Nexen be liable for any amount of damages in excess of amounts paid by Buyer for Products or services as to which a breach of contract has been determined to exist The parties expressly agree that the price for the Products and the services was determined in consideration of the limitation on damages set forth herein and such limitation has been specifically bargained for and constitutes an agreed allocation of risk which shall survive the determination of any court of competent jurisdiction that any remedy herein fails of its essential purpose Limitation of Damages In no ev
13. ubricator injects oil into the pressurized air forcing a constant oil mist into the air chamber Lubricator drip rate is properly set when oil drops form in the sight gauge every time the DPB Brake is cycled or one full drop every ten to twenty cycles For quick response a short air line between the control valve and the DPB Brake is recommended W here long air lines are required use a quick exhaust valve CAUTION Do not use rigid pipe or tubing for air line connections Locate lubricator above and within ten feet of DPB Brake S ynthetic lubricants are not recommended use a low viscosity petroleum base oil such as SAE 10 For a DPB Brake cycled infrequently apply two or three drops of oil into the air inlet every two weeks FORM NO L 20094 C 0601 MEX 55 53 63 2331 MTY 81 83 54 10 18 lt DIST AUTORIZADO 442 1 95 7260 ventasQindustrialmagza com OPERATION CAUTION Prior to placing DPB Brake into service verify that all screws are secured to the recommended torque See Table 2 TABLE 2 Recommended Tightening Torques The DPB Brake engages when air pressure is introduced into the C ylinder Drive Disc Air pressure pushes the C ylinder Drive Disc against the Flange Mount Disc and forces the C ylinder Drive Disc in the opposite direction TABLE 3 Maximum Recommended Operating S peeds DPB 9T DPB 11T DPB 13T DPB15T This engages the Friction Facings with the friction
14. ut in Q D bushing to loosen Q D bushing from shaft and remove DPB Brake Proceed with Steps 3 through 8 for Friction Facing replacement Remove Cap Screws Item 21 See Fig 7 Separate Flange Mount Disc Item 5 from Flanged Hub Item 36 and Splined Hub Item 35 See Fig 7 Remove Retaining Ring Item 27 See Fig 7 7 WAVANIMINE Special attention should be exercised when working with retaining rings Always wear safety goggles when working with spring or tension loaded fasteners or devices continued FORM NO L 20094 C 0601 CES MNaacza MEX 55 53 63 23 31 MTY 81 83 54 10 18 SAL DIST AUTORIZADO 442 1 95 72 60 ventasQindustrialmagza com 9 Fully supporting S plined Hub Item 35 press Flanged Hub Item 36 out of Bearings Item 25 See Fig 7 10 Remove Retaining Ring Item 26 See Fig 7 11 Fully supporting S plined H ub Item 35 press Bearings Item 25 out of Splined Hub See Fig 7 12 Clean bearing contact surfaces of Flanged Hub Item 36 and Splined Hub Item 35 with safety solvent 13 Press new Bearings Item 25 into S plined Hub Item 35 See Fig 7 NOTE When installing new bearings carefully align bearing O D with bore of splined hub Apply Loctite 601 or equivalent to outer race of new bearings 14 Install Retaining Ring Item 26 See Fig 7 15 Press Flanged Hub Item 36 into Bearings Item 25 and Splined Hub Item 35 See Fig 7
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